Fishing exposes your hands to skin-cancer-causing UV rays for two reasons. First, because you’re on the water, you’re exposed to both direct sunlight and sunlight reflected off of the water’s surface. Second, when you’re using a fishing rod, you hold the rod in front of you, so your hands get the full force of the sun’s rays. You can use sunscreen, but that tends to run down onto your palms and fingertips, making it difficult to fish efficiently. Gloves that are designed to protect your skin from the sun are breathable, so your hands won’t get hot and sweaty, and have gripping surfaces so you can hold a fishing rod and operate a reel easily.